If you could install a game, like a real official DS/DSi cartridge game. You install it so you never have to take the game out again, only you HAVE to have the official cartridge so no ROMs can be downloaded and installed. Also, the games can only be installed once, but the saves can be updated from the cartridge and the 3DS. Or they wipe the cartridge so you can't play on both and put the data on the 3DS. Then if you want your cartridge back, put the "blank" one back in and install the save again (removing it from the 3DS memory) IDK, like my idea?